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• Time of issue:2022-03-31 08:37
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(Summary description)Steel performance parameters ●Steel number/grade/steel grade: 4142H ●Code: H41420 ●Steel name: Steel for oil drilling ●Execution standard: ASTM A304-2016 Quenching Hardenability Alloy Steel Bar JX2534-2016-01 Xingcheng Special Steel Enterprise Standard QZ/SJ.G7308-2019 Shigang Enterprise Standard AISI American Iron and Steel Institute Standard SAE J1268-2010 steel strip standard ●Delivery status: annealed status, the specific delivery status should be indicated in the warranty book. ●Main production steel mills: Jiangyin Xingcheng, Shigang, Fushun, etc. 4142H Summary: It is a kind of medium hardenability steel. It has high strength and good comprehensive mechanical properties after heat treatment. It has good manufacturability and the maximum operating temperature can reach 420 °C. It can withstand various forces and has good mechanical properties. At the same time, it can cope with the erosion of corrosive liquids such as hydrogen sulfide and carbon dioxide contained in the environment, and has good corrosion resistance. ●4142H chemical composition range value: Note: The actual chemical composition is subject to the steel factory warranty. Carbon C: 0.39～0.46 Silicon Si: 0.15～0.35 Phosphorus P: ≤0.035 Sulfur S: ≤0.040 Manganese Mn: 0.65～1.10 Chromium Cr: 0.75～1.20 Molybdenum Mo: 0.15～0.25 4142H mechanical properties range value: Note: The actual mechanical properties are subject to the steel factory warranty. Tensile strength σb (MPa): ≥931 Yield strength σs (MPa): ≥690 Elongation δ5(%): ≥13 Section shrinkage ψ(%): ≥45 Impact energy Akv(J): ≥48(-20℃) Annealing hardness: ≤269HB Sample size: sample blank size is 100mm 4142H use: Auger collar, square kelly, hexagonal kelly, trenchless drill pipe, drill pipe sub, weighted drill pipe, drill string combination, drill collar, non-magnetic drill collar, drilling tool, drill pipe joint, drill pipe body Wait. 4142H heat treatment process: 4142H is subjected to stress such as tension, compression, torsion and bending during use, as well as the friction of the well wall, the corrosion and friction of oil, gasoline and mud. Therefore, the correct heat treatment process plays an important role in the use of 4142H steel. Heat treatment specification: Quenching: 850℃, holding time 45min, oil cooling; Tempering: 610-640℃, water cooling, air cooling; (Note: the lower the tempering temperature, the higher the tensile strength and yield strength; the lower the elongation and impact energy) Annealing: 810℃. 4142H Features: The steel used for oil drilling is generally added between the drill pipe and the drill collar when forming the drill string to prevent the sudden change of the drill string cross section and reduce the fatigue of the drill pipe. Used in directional wells, it can drill at high speed with low torque, reducing the wear and tear of the drill string, because its rigidity is smaller than that of drill collars, and the contact area with the well wall is small.